Journal of the Society of Motion Picture Engineers (1930-1949)

Page scan 00093 from Journal of the Society of Motion Picture Engineers

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
00093
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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76 A. S. HOWELL AND J. A. DUBRAY [J. S. M. P. E. Fig. 7 illustrates the dimensions of the "Extreme." The proposed height of the picture is 27.79 mm. for the camera aperture and 26 mm. for the projector aperture. The height of the camera aperture corresponds to the sum of the pitch of six perforations less a dividing space between picture frames 0.71 mm. in width. The proposed width of the picture is 46.31 mm. for the camera aperture and 43.31 mm. for the projector aperture. The width of the space available for the sound record is 5.08 mm. or double the width available in today's 35 mm. standard film for the same purpose. The over-all width of the film is 61.31 mm. C«K1«I»«I W»0^«CTt «m*T-JKC APBMTUK FIG. 7. Dimensions for the "Extreme." If we consider a speed of 24 pictures per second as the standard, the length of sound record recorded per second would be 684 mm. as compared with 456 mm. for the 35 mm. standard film, or an increase of 1.5 times. It is apparently the consensus of opinion that the frequency which it is possible to record is proportional to the running speed and, therefore, to the length of the sound record. Considering this as a true expression, it appears logical to suggest that the high frequencies which it would be possible to record with the "Extreme" dimension would enhance the quality of sound reproduction.